原生js实现canvas粒子线条交汇动画效果
代码语言:html
所属分类:粒子
代码描述:原生js实现canvas粒子线条交汇动画效果
下面为部分代码预览,完整代码请点击下载或在bfwstudio webide中打开
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <style> * { margin: 0; padding: 0; } html, body { overflow: hidden; } body { position: relative; } </style> </head> <body translate="no"> <script> class Tool { // random number. static randomNumber(min, max) { return Math.floor(Math.random() * (max - min + 1) + min); } // random color rgb. static randomColorRGB() { return ( "rgb(" + this.randomNumber(0, 255) + ", " + this.randomNumber(0, 255) + ", " + this.randomNumber(0, 255) + ")"); } // random color hsl. static randomColorHSL(hue, saturation, lightness) { return ( "hsl(" + hue + ", " + saturation + "%, " + lightness + "%)"); } // gradient color. static gradientColor(ctx, cr, cg, cb, ca, x, y, r) { const col = cr + "," + cg + "," + cb; const g = ctx.createRadialGradient(x, y, 0, x, y, r); g.addColorStop(0, "rgba(" + col + ", " + ca * 1 + ")"); g.addColorStop(0.5, "rgba(" + col + ", " + ca * 0.5 + ")"); g.addColorStop(1, "rgba(" + col + ", " + ca * 0 + ")"); return g; }} class Angle { constructor(angle) { this.a = angle; this.rad = this.a * Math.PI / 180; } incDec(num) { this.a += num; this.rad = this.a * Math.PI / 180; return this.rad; }} /* variable for canvas. */ let canvas; class Canvas { constructor(bool) { // create canvas. this.canvas = document.createElement("canvas"); // if on screen. if (bool === true) { this.canvas.style.position = 'relative'; this.canvas.style.display = 'block'; this.canvas.style.top = 0; this.canvas.style.left = 0; document.getElementsByTagName("body")[0].appendChild(this.canvas); } this.ctx = this.canvas.getContext("2d"); this.width = this.canvas.width = window.innerWidth; this.height = this.canvas.height = window.innerHeight; // mouse infomation. this.mouseX = null; this.mouseY = null; // sprite array and quantity. this.numChildren = 7; this.maxLevels = 5; this.trunk = []; } init() { this.trunk.push(new Branch(this.ctx, 1, 0, this.width / 2, this.height / 2)); } render() { //this.ctx.clearRe.........完整代码请登录后点击上方下载按钮下载查看
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